I'm convinced it all comes down to the numbers. There are many more guys trying, so the women are more selective. That's why you see these crazy requirements on their profiles like, "You must be 6 feet tall to talk to me", or "You must be black/white/Asian/hispanic" or "No beard/no thanks". Some even ask for money. Many will say they're looking for a nice guy, then a nice guy will contact them, and they won't respond
They can do all of that, and still have a guy give them exactly what they want, because there are desparate guys out there willing to do anything for female contact.
I don't think it's just a character thing only found in women though, lol. If there was a surplus of women instead, guys would do the same thing.
That's true on the main dating sites. The free sites are the worst because guys outnumber girls on those sites because they don't even have to pay to play so to speak.
I once counted in my area on OKcupid . com and found the ratio of males to females to be at least 3 to 1 or maybe it was 4 to 1, something like that. With ratios like that, it immediately puts the odds against the guys knowing that a girl already has 3 to 4 times the selection compared to the guys.
The funny thing is the truth is it tends to be women have all these standards and guys either just wanna get laid or they just want a girl who will show up and treat him fairly. It makes it harder when guys don't have as many standards as women because it means women have an easier time getting guys to message them and the guy will be easier to please.
There is more, but i won't get into all of it. Point is, you are very right, women tend to have a huge advantage in dating.
About the nice guy thing. A lot of girls say they want nice guys, and they do want nice guys, it's just there are so many nice guys out there. When there are so many nice guys, then girls aren't going to pick a guy just cuz he's nice. That's when the standard thing kicks in.
With all this said, I have still found many women on there and met them on the date and they had the same mindset as a lot of guys.....they mainly wanted sex. It was cool with me, I don't mind having some fun here and there, so I usually wound up making a move on them and yadyada.
I could say more but I'll shut up now.